Chemistry, 09.01.2022 05:40 zulfiquer5541
A mineral sample scratches a fingernail but does not scratch the penny, glass, or steel as shown below. What is the hardness of the mineral?
about 4
about 5
about 2
about 3
Answers: 3
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A mineral sample scratches a fingernail but does not scratch the penny, glass, or steel as shown bel...
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